The wiki-page lists the copyright status as CC-BY-SA 3.0.
Does the community concur that these works are intended to be under that licence? Were they under a similar license before? I think they are really cool, and was thinking about an open-source (CC-BY-SA) novel involving them, but I wanted to know whether or not it was legally intended to be under the same license (so I could use it)

The wiki-page lists the copyright status as CC-BY-SA 3.0.
Does the community concur that these works are intended to be under that licence? Were they under a similar license before? I think they are really cool, and was thinking about an open-source (CC-BY-SA) novel involving them, but I wanted to know whether or not it was legally intended to be under the same license (so I could use it)

Yeah, but that is cumbersome as heck…thats precisely the sort of situation CC is supposed to avoid…but, I wasn't referring to wikipedia either…each page of THIS wiki is what says it (look at the footer of this page). Thats what made me think this was a relevant question.

I, for one, am not overly bothered. The cc-by-sa is a fair license in my opinion. I've only authored two scp articles, and done a few images, but as far as I'm concerned, do what you like with them so long as it's within the terms of the license.
I obviously can't speak for other authors, but I haven't seen a single copyright disclaimer on any of the 350+ articles on this site. Nobody's here for profit.

I most certainly did not get into writing stories and such because I thought there was any money in it. But I also wouldn't be able to stand by, literally starving (couldn't afford food again today!) while someone else did profit off my work. I'm very proud of my accomplishments, and while I'm completely willing to let anyone use my work, if they're making profit off my ideas in particular, I'm going to call bullshit. Unless I'm getting a cut.

For anything that's not for a profit, I would love to see if anyone could expand on what I've done.